Sum
Cost of 105 envelopes is Rs. 350. How many envelopes can be purchased for Rs. 100?
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Solution
In Rs. 350, the number of envelopes that can be purchased = 105.
Therefore, in Rs. 1, number of envelopes that can be purchased = `105/350`
Therefore, in Rs. 100, the number of envelopes that can be purchased
= `105/350 × 100 = 30`.
Thus, 30 envelopes can be purchased for Rs. 100.
Concept: Concept of Unitary Method
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